Measuring Skin Electrical Potential With the Kelvin Probe: Minimizing Noise

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT01399879
Recruitment Status : Completed
First Posted : July 22, 2011
Last Update Posted : July 22, 2011
Information provided by:
Massachusetts General Hospital

Brief Summary:
The Scanning Kelvin Probe measures surface electrical potential without actually touching the skin. This is a pilot study to evaluate methods of minimizing noise during Scanning Kelvin Probe measurements. This project will focus specifically on noise arising from physical movement and environmental electrical field.

Condition or disease Intervention/treatment
Healthy State Other: Faraday cage, movement stabilization

Study Type : Observational
Actual Enrollment : 24 participants
Observational Model: Case-Only
Time Perspective: Cross-Sectional
Official Title: Measuring Skin Electrical Potential With the Kelvin Probe: Minimizing Noise
Study Start Date : September 2010
Actual Primary Completion Date : February 2011
Actual Study Completion Date : February 2011

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Noise
U.S. FDA Resources

Group/Cohort Intervention/treatment
Healthy Volunteers Other: Faraday cage, movement stabilization
The Faraday cage is a copper-mesh cage that surrounds the device and test site. It helps eliminate surrounding electrical noise. Movement stabilization will be achieved by placing a velcro strap over the arm to minimize random movements.

Primary Outcome Measures :
  1. Variability in surface electrical potential measurements [ Time Frame: Within 24 hours of testing ]
    This study focuses on the ability of the Kelvin Probe to measure skin electrical potential. Because it does so without touching the skin, it is prone to noise - specifically physical movement and surrounding electrical noise. The variability in surface electrical potential is a way to determine how stable the measurements are. It can be determined immediately after testing - and will be used in data analyses (comparing across study volunteers) approximately 24 weeks after testing is complete.

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years to 65 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes
Sampling Method:   Non-Probability Sample
Study Population
Healthy volunteers

Inclusion Criteria:

  • Age greater than 18 years

Exclusion Criteria:

  • chronic medical condition requiring daily medications (hypertension, diabetes, hypothyroidism, etc)
  • movement disorders/tremors
  • extensive scars on the hand
  • latex-allergies
  • cardiac implantation, metallic joint/bone replacements (defibrillator or pacemaker)

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT01399879

Sponsors and Collaborators
Massachusetts General Hospital
Principal Investigator: Andrew C Ahn, MD MPH Massachusetts General Hospital

Responsible Party: Andrew C. Ahn, Principal Investigator, Massachusetts General Hospital Identifier: NCT01399879     History of Changes
Other Study ID Numbers: 5R21AT005249 ( U.S. NIH Grant/Contract )
First Posted: July 22, 2011    Key Record Dates
Last Update Posted: July 22, 2011
Last Verified: July 2011

Keywords provided by Massachusetts General Hospital:
Surface potential
Motion stabilization